Weaving loom for continuous weaving in which the weft is inserted by means of pirnless shuttles



March 2, 1937. w s 2,072,160

- WEAVING LOOM FOR CONTINUOUS WEAVING IN WHICH THE WEFT IS INSERTED BYMEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 'l IIll/r1111.

ATTORNEYS March 2, 1937. R D A 2,072,160

WEAVING LOOM FOR CONiINUOUS W EAVING IN WHICH THE WEFT IS INSERTED BYMEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 2 I NVENTO R R0 wwo/v flaws ATTORNEKS March 2, 1937. R DEwAs 2,072,160WEAVING LOOM FOR CONTINUOUS WEAVING IN WHICH THE WEFT IS INSERTED BYMEANS OF PIRNLESS SHUTTLES Filed June 17, 1933 3 Sheets-Sheet 3 rINVENTOR BY Farm/v0 fifms m4 ATTORNEYS 55 the'inserter andthe selvedgeis folded into the Patented Mar. 19361 TMUNITTED. sTATJ'Es 2,072,160.WEAVING LOOM Foa CONTINUOUS WEAV- JNG IN WHICH THE WEFT IS INSERTED BYMEANS OF nameless SHUTTLES Raymond Dewas, Amlens, France 1 ApplicationJune 17, 1933, Serial No. 676,251

In France June 23, 1932 I The present invention relates to improvementsto the invention described in my pending U. 3. application filed May 31,,1933, Ser. No. :673,672, Y for improvements in Weaving looms for con-r5 tinuous weaving in'whichthe weft is inserted by means of pirniessshuttles;

v The improvements which arethe'object of the present invention have fortheir aim the possibility of allowing the weft to pass'altemately fromeither side of the loom by means of weft threads fed from two largebobbins of which one is arranged on eachside of Ithe'selvedges. a

As in my above-mentioned application, these improvements enable loomswhich are, provided with them to work at a very high speed and. in

any position, horizontal, oblique or vertical, in, that the insertionmember with equal facility can be thrown acrossthe shed horizontally,ob-

, liquely or vertically. J

A The improvements also enable the shuttle to be thrown alternately fromeach side of the loom,

eitherby throwing devices arranged at each side of the selvedges andprovided with discs of the type described in the-above mentionedapplication, or by means of picking sticksor rods of the already knowntype, or finally, by means of electro-magnets in which the direction of.the current would be alternately reversed, etcf:

Further, the improvements make it possible by using the membersdescribeddn the above-mentioned application but disposing themsymmetrically on each side, of the selvedges, to'present' 5 the weftandto release it, as well as to cut the weft vdth or without turning-inthe end of the preceding shoot whereby the selvedges may or may not beformed, as the .case may be. r

Finally, these improvements can be employed on looms having shuttleboxes which form part 7 of the sley, or which are rigidly fixed, so thatthe reed and the sley, which may or may n'ot include a shuttle racearethe only movable parts. I In'accordance with the invention described in,the above entitled patent application, the process of insertion ofth'eweft in the shed, in a single weft thread coming from a stationary bob=bin, with a fast'selvedge is aracterized by the feature that the weftthread stretched in front of and across the opening of the shed, betweenthe selvedge and the weft bobbin, and is seized by the weft inserter after this inserter has been driven and at the time of its entry into theshed, and is cut by a cutting device which is integral withthe'inserter,in such a manner that the portion of weft thread which liesbetween "vice.

of the cloth, isbeing bent into the entrance of in Claims. (c1. 139-125)j, shed by the inserter entering the saidlshed, so

as to form the fast selvedge, and that the portion of weft thread whichlies between the inserter and the bobbin, from which the weft thread canrun off or unwind, is passed into the same shed 5 as a single thread andis released from the inserter when it comes out of the shed. r i Thisprocess, when a fast selvedge on one side of the fabric is not required,is characterized by r tegral with the inserter but is arranged exter-15" nally and in front of the openingof the shed between the point ofthe fell of the cloth and the path of the inserter,'in such a mannerthat the portion of weft thread which lies betweenthe inserter and thepoint of the fell of the cloth 20 with the selvedge remains free outsideofthis point. Furthermore, the portion of weft thread which lies betweenthe inserter andthe bobbin, from which the weft thread can run off orflunwinditself, is placedinside thesame shed as-a single .thread andreleased from the inserter when it comes, out of the shed.

In certain cases, in order to insert 'in one of 'the selvedges one endof thread only out of two, I

As aweft inserter is shot into the shed, thev weft stretched on its pathis.caught into the two.prongs of the rider-and held between the 40springy prongs of the amp. As the inserter is continuing its strokealong into the shed, the weft, stretched between the eyelet and the fellthe shed. 15

Under the tension of the thread thus bent, as the inserter progresses,the said thread slides between the springy branches of the clamptill itcomes into contact upon the edge of the-cuttingblade, where it is cut.vt

Thethus severed thread, allows the inserter to continue its stroke. Thepart of said -se vered thread, which is still heldin the clamp and goesup to the bobbin, is carried along the shed toconstitute the .next pick,and the part of same its said severed thread which goes up to the fellof the cloth, remains in-turned into the entrance of the shed, to formthe fast selvedge. I

It is understood that, the passing of the weft woven-material and at alater stage be sheared g In order to explain the present invention moreC fully, and by way of anexample' of the applies-- 7'5; tioniof theimprovements which are its object,

several arrangementsare described hereinafter and shown diagrammaticallyin the accom panying drawings in which:

Figure 1 is a side elevation of theweft inalternately from each side ofthe loom, renders serting member; i v a unnecessary the use of theunidirectional closed Figure 2 isa plan view of the same, weft incircuitemployed for the passing of the weft serting member showing the surfacewhich slides from one side only of the loom, since both the along thereed and also showing the gripping ends of the conduit which are'adjacent'to each clamp which is ca1ried by the member, andselvedge maybe used as shuttle boxes; the dewhich is adapted to grip' the weftthread at both 10- vice provided with discs, which throw the shutend itle across the shed and back in the cdnduit for Figure 3 is a plan viewof the same weft incompleting the circuit, also can be used equallysertixg member showing the surface which W ll f r h w n the shootalternately, it being 'faces the fell of the cloth, and illustratingtheunderstood that in this case the discs of the two slots and thecentral groove with which the 15 above mentioned device are operated insuch a member is provided; v manner that they will rotate in theopposite di- Figure 4 is an end view of the safiie weft inrection. 1serting member; I

- These improvements, which are the object Of Figure 5.15 a, fragmentaryplan view of the I the present invention, relate, among others, to warp,of the sley, of the end of the conduit 20 the following elements: I Iwhich 'constitutesthe shuttle box, and of the 1- The member for insertinh Weft, 0r pirnmovable members which present and release the 165$Shuttle, which is 50 arran e that it can gripv I weft, the presentingmember being in position the weft alternately on each side of the loom,cut 1 for gripping the weft, the weft inserting member it and re i Abeing shown at its entry into the shed, the throw- 25 2. The memberswhich present, release and in'g device with discs or the like not beingshown sever the weft. v v in this figure;

As regards the member'for. inserting the weft Figure 6 is acorresponding side elevation I or pirnless shuttle, which, according tothe presviewed from the end of the warp;

Q ent invention, is adapted to insert the weft al- Figure 7; is a planview similar to Figure 5 ternately from each side of the loom, this is'sim-' and showing the insertion member continuing its ilar to theinsertion member described in the, coursethrough the shed; J a abovementioned application and consists of a Figure 8 isa plan view similarto Figure 5,

n rectilinear piece, preferably of metal, having an showing theinsertion member at the end of its essentially triangular or trapezoidalcross sec return journey after having been thrown ir ,35.

tion and which is split vertically in its; middle the other selvedge,the'movable, members for plane at each end, for a certain length; whilepresenting and releasing the weft aving been so the central part whichremains solid i' s prodisplaced that the releasingblade isin-juxtaposivided on the side which faces the reed with a tion withthe'central slot and the clamp, while central groove in which isarrangeda resilient the presenting member is out of the pathof the. :10clampwhich can grip the weft thread from both Y said insertion memberfor transporting the ends, as will be explained hereinafter. weft; I

. As regards the members for presenting and Figure 9 is a correspondingside elevation.

' releasing the weft, according to the present in yiewed from the end ofthe warp; vention, they consist, as in the above mentioned Figures 10and 11 are similar views to Figures 45 application, of an eyeletthrough, which passes 5 and 6, showing the arrangement of the cuttingthe weft thread coming from the bobbin and of member fixed adjacent to aselvedge, when the a blade for pushing apart the prongs of the cuttingmember is arranged independently of the clamps, an eyeletand'a bladebeing arranged insertion member; t H a on each side of the selvedges.Figure 12 shows in elevation an alternative The said members are mountedon movable design for the member for inserting the end of supportsadapted alternately-to move the eyelet the weft, when this memberisintihded to cointo position for passing the weft thread on to opcratewith fixed presenting and rel easing memtheshuttle at the moment whenthe said shutbersfor the weft; v

551118 enters the shed to pass the end of the thread Figure 13 is a planview "oi the'weft inserting through it, and rto move the bladeinto'position member, sho g-the surface which slides along' fl forforcing apartthe prongsof the resilient clamp the reed; an r I oi. theshuttle when thesaid shuttle, thrown from- Figure 14 1s a plan view ofthe weft inserting the opposite selvedge, has traversed the shed andmember shown in Fig. 13 and shows the surface I carried the end of theweft through it. which faces the fell d!v the cloth; I ,60

As cbncems the cutting members, these are Figure l5 is an end view,looking at the left 1 the same as mentioned in the above mentioned hand'end of the inserting member of Figure 13 application and consist ofcutting blades either Figure 16 is'the sameview from the right handarranged in theshuttle itself beneath the level end; I I I,

of the clamp, there being one blade for each Figure 1'7' showsdiagrammatically a resilient- 5 direction of the motion of the shuttle,in order to, clamp carried'by the weft inserting member; f enableselvedges to be formed by bending back Figure 18 is a sectionjalong theline li -l8 of i the ends of the preceding-shoots; or fixed on Fig. 17.I w I theloom at each side of the .selvedges, if the Figuresl to4-, showthe inserting member I for ends of the weilft are to remain outside ofthe the 'weft, lwhich consists of arectilinear piece of o metal,preferably having a triangular or trapezoidalcros's section, (Fig. 4)and provided with vertical slots 2' and 3 (Figs; 2 and 3), while themiddleipart, which is' solid is provided, upon the face which slides on\the reed, with a central groove 4 which connects the two centralopposite slots2and3.

In this groove or slot I the clamp for holding the weft thread isarrangedfsaid clamp being shown separately in Figs. '17 and 18, and com:prising two straight flexible steel prongs 5 arranged parallelly and inelastic contact, the one against the other, in the centre of the groove4, so as not to come into contact with the walls of thesaid groove, theends 5a of these prongs .being bent back towards the said walls in whichthey are embedded so as to maintain the clamp in position, so that theweft thread or the releasingblade which is,arranged on either side ofthe-selvedge can enter and pass between the prongs, 5 of the clampeither from one end or from the other, the elasticity of the contactbetween the two prongs-5 being increased, by means V of auxiliarysprings 6.

Below this clamp, the ends of which may be extended into the slots 2 and3, a cutting blade i (Fig. *3) is arranged'in the bpttom of each of thesaid 'slots. I

According to Figures '5 to 9, which have refer- --en0e to the memberswhich present, release and cutthe, weft, these members comprise aneyelet 8 and a flexible blade 9, (Figs. 6 and 9), which are alwaysplaced together in groups and in such manner that onesuch group isarranged near each selvedgeof the wovenmaterial.

' Each group of members 8 and 9 is mounted on a movablesupport l0 whichslides, for example, in one of the caps ii of the reed l2 and iscontrolled byga cam or lever not shown inthe drawings and operated inconjunction with the ber l is, thrown into the shed, Figs. 5 and 6, the

weft inserting memberl is situated at the end oi the conduit l3 (Figs.5, 7, and 8) which forms the shuttle box- (the throwing member with Idiscs or the like, is not shown in the drawings),

the support I!) is in the position shown in Fig. 6, said'support movingthe blade 9 into an inoperative position and the eyelet 8 into aposition where it presents the thread which passes from the point of thefell of the cloth M to the bobbin t5; the thread passes'into one of theslots 2 or, 3 of the weft inserting member |,and is held between theprongs 5 of the clamp where the thread remains fixed until it arrives atthe other selvedge. By the operation of the adjacent cutting blade I,which is arranged in the slot 2'or the slot 3 of the weft insertingmember I, the weft is then cutwhile the end ofth'e preceding shoot isbent .back towards the inside of the shed for the pu'rposeof forming aselvedge. 7 Fig. 7 shows the weft inserting member I while it is passingthrough the shed. a I 7 When the shoot has almost passed through, theweft inserting member i has reached the end of its travel (Figures 8 and9) the support llliFig.

9} having, been displaced in such a way as to place the eyelet8 outsidethe path of movement or the 'member I, thus moving aside the weft,

thread between'the point of the'fell of. the cloth and the bobbin, theblade a'thereby having been of the other.

brought inn) juxtaposition with pne ofthe slots 2, or -3 of the weftinserting member I; -the .blade 9 penetrates between the prongs 5ore-the clamp and moves them aside thus releasing the end of the shootwhich has been passed-across .the shed, and which comes outthmugh theopposite slot whilst the weft inserting member I enters its box. f

In the position shown in Fig. 8, the weft passes above the weftinserter, as it is raised by the eyelet 8 off the path of the inserter,as in Fig. 9, so as to permit said inserter to pass-onto! the shed) intothe conduit- 13, the releasing blade 9 having been brought in line withthe groove 4 of the inserter' I (Fig. -9).

When the i'nserter works on the reversedirection; it comes out of thebox l3, and catches the thread which is stretched between the point of,the fell of the cloth II and the bobbin l5 through the eyelet 8 whichhas been lowered, as shown inFi gsjand M for actuating the movablesupport Any means Ill sliding in one of the caps of the reed 12, may

be employed. 1

A device of asomewhat difierent construction blades i. Instead oftheseblades, a cutting blade i8 is operatively arranged on a support,adjacent each, side of the selvedges (Figures 10 and 1,1) and cuts theweft as described in the above men tioned patentapplication Ser; No.673,672. 7

It is understood thatwithout departing from the spirit of .the presentinvention, changes, modifications or improvements canbe made and: in thesame way equivalent means can beapplied.

' Thus, for example, the single clamp 5of the weft inserting member i,could be replaced by two clamps, one being arranged in the extension Inthe same way, for example, and shown in Figures 12 to 16, the weftinserting member I ,is illustratedmin Figures .10 and 11 of thedrawcould have the'same shapeand cross section as the member shown inFigures 1 to 4, with thediiierence that its two end slots 2' and 3?; areoblique in relation to the height of the member and issue on the sidewhich slides along the reed i2 (Figs; 6, 9, and 1'1)..to the right andto the left ofl the centre line, there beingthe further difierence thateach of these slots communicates with a groove 4' or t" respectively,anged also to the right and to the leftrespe ively of the centre line,the said slots 2' and 3" issuing, on the side towards the fell of thecloth, on or very nearto the centraLplane of the weft inserting -memberi'.

Two clamps 5' and 5" formed in th'e same way as the clamp 5 are arrangedin these slots, so as to allow the releasingblade 9 to pass With thismodified type of inserting member i- 4 the eyelets 8 and the blades 9for presentingand releas ng the weftare fixed and arranged on fixedsupports on each side of the selvedges, in such a 'way'that, as regardsthegroup relating to the right selvedge, th'e eyelet is in line with theslot 2' and the groove 4', whilst the blade is in line with the slot 3'and the; groove/4C", sathat it is able to separate the prongs of theclamp 5" when theweft inserting member which is thrown from the leftselvedge, leaves the right selvedge to reenter its box. Theweft thread;which is not able to penetrate the groove 4', slides underneath the T-weft inserter while thellatter -is ice-entering its. 1

box. Then'the weft inserter. is drawn irom right 15 entering its box.

thrown "from left to rightyth'e, thread which is v to left; the threadwhich is lightly stretched is able to penetrate the slot. 2' in thecourse of this movement, reaching the clamp and is cut by the cuttingblade- H 1 5 As regards the group relating to the left selvedge, theeyelet is arranged in line with the slot 3 and thegroove 4", whilst theblade is in line withthe slot 2 and the groove 4' so that it is able toseparate the prongs of "the clamp 5' when the weft inserting member Iwhich is thrown from the right selvedge, leaves the left selvedge tore-enter its box. The weft thread, which is not able to penetrate thegroove 4" slides above the weft inserter while the latter is re- Thenthe weft inserter is lightly stretched, is able to penetrate the slot 3'in the course of this movement, reaching the clamp 5", and is cut by thecutting blade. I claim: r I

1. In shuttlelesslooms for continuously feeding the weft shots, incombination with a shed, and a pair of bobbins placed on both sides ofthe loom, the weft threads fed from said bobbins being stretched infront of .both ends of the shedlfrom the selvedges of the last pick atthe fell of the i X cloth to said bobbins: a device for inserting singlewefts and weaving from both sides of the loom,

' said device comprising a weft inserter for alternately gripping saidthreads, cutting means carried by said weft inserter, that part of eachweft thread which alternately stands between the'weft weft, and meansfor releasing the last-mentioned part of the weft from said weftinserter after it 40. has passedthrough the shed.

2. In a weft inserting device, a weft inserter having a. metal body of asubstantially angular -cross-section, said-body being split verticallyat its two ends, whereby 'a double pronged rider having two slots is:formed, and meansforming a the'weft shots, in combination with a shed,and

-" groove {in said body, said groove extending'lon tudinally between andconnecting the saidslots, whereby the weft ,thread why pass through saidopposing slots. 1

3. In a weft inserting devibe, a weft inserter havinga metal body of asubstantially angular cross-section said :'body' being split. verticallyin its middle plane at its two ends, whereby a double pronged riderhaving two slots is formed, 55.the middle portion of said body having alongi- "tudinal central groove, saidgroove being in. the longitudinalcentral plane passing through said slots, and a' clamp carried by saidweft inserter andsituated in said groove; said clamp comprisco ing twoparallel resilient prongs which are in 1 contact with each-other, theends of said prongs being bent toward the walls of said groov to 1maintain said clamp in position'in the middle of said-groove. L Y

4. In a weft inserting andcutting-device, a "weft inserter havinga metai r of a substantially angular cros'ssection' d body being splitvertically in its middle plane. at its two ends",

whereby-a double pronged rider having two slots is formed, the middleportion of said body having a'longitudinal central groove, said groovebeing in the longitudinal central plane passing through n said slots aclamp carried by said weft inserter and situated in said groove, saidclamp comprising .1 two'parallel resilient prongs which areincontactwith each other, the ends of said prongs being bent toward the wallt ofsaid groove to maintain said clamp in position in the middle of saidgroove, and a pair of cutting blades carried by said weft inserter, eachblade being situated at the bottom 5 4 from the selvedges of the lastpick at=- the fell'cf the cloth to said bobbins; a device for insertingsinglewefts and weaving from both sides of the i5 loom, said device,comprising a weft inserter for alternately gripping said'threads, saidweft,v inserter having a metal body of a substantially angularcross-section, said body beingsplit vertically atits two ends, whereby adouble pronged 20 rider having two slots is formed, the middle 'po'r-rtion ofsaid body having a longitudinal central groove, said groove beingin the longitudinal cen'- tral plane passing through said slots, a clampcarried by saidweft inserter and situated in said 25 groove,-said clampcomprising two parallel resilient prongs 'whichare in contact with eachother, the ends of said prongs being bent toward the walls of saidgroove to maintain saidclamp in position in the middle of said groove,"cutting 30 means carried by said weft, inserter, that part of i e chweft thread which alternately stands 56-,

, een the weft inserter and the selvedge being bent into the shed by theweft inserter while said situated between its bobbin and the weftinserter being'passed by said weft inserter through said shed as asingle weft, and a pair of movable weft releasing blades, each bladebeing adaptedto pass through a separate slot and penetrate between,40thefresilient prongs of the clamp as the weft inserter comes out of theshed to releasethe lastmentioned part of the weft from said weftinserter after it has passed through the shed. i r

6. In shuttleless looms; for continuously feeding 45 serting singlewefts and weaving from both sides.

of the loom, said device comprising a weft in-; serter foralternatelygripping said threads, cutting means carried by said weft inserter, that55 part of each weftthread which alternately stands between the weftinserter and the selvedge being bent into the shed by the weft inserterwhile ing the weft shots, in combination with a shed,

and-a pair of bobbins placed on both sides ,ofthe. a

' loom, the weft threads fed from said bobbins being stretched infrontof both ends of the shed from the selvedges of thelast weft inserterenters the shed, the part of the weft 3 I pick at the fell of the clothto said bobbins; a device for inserting single wefts and weaving fromboth sides of the loom, said device comprising a weft inserter foralternately gripping said threads, cutting means carried by said weftinserter, the part of the weft situated between its bobbin and the weftinserter being passed, by said weft inserter through said-shed as asingle weft, a pair of weft releasing blades, each blade being adaptedto pass through a separate slot and penetrate between the resilientprongs of the clamp as the weft inserter comes out of the shed torelease the last-mentioned part of the weft from said weft inserterafter is has passed through the shed, a pair of movable thread guidingeyelets "'siutated at both ends of theshed, said eyelets placing thethreads stretched between the fell of the cloth and the bobbinsalternately in and out of the path of the weft inserter, and a pairofmovable supports, each support carrying a releasing blade and aguiding eyelet.

8. In shuttleless looms for continuously feed: ing the weft shots, incombination with a shed, and a pair of bobbins placed on both sides ofthe loom, the weft threads fed from said bobbins being stretched infront of both ends of the shed from the selvedges of the last pick atthe fellof the cloth to said bobbins; a device for inserting singlewefts and weaving from both sides of the loom, said device comprising-aweft inserter having gripping means at each end for alternately grippingsaid respective threads, cutting blades mounted independently of theinserter on both sides of the selvedges at the entrances to the shedbetween the point of the fell-of the cloth and the path of the inserterfor cutting a weft extending between the selvedge and a bobbin close tothe selvedge, the leading end of the part of the weft extending to thebobbin being gripped by said inserter and passed thereby through saidshed as a single weft, and means for releasing the last-mentioned partof the weft from said weft inserter after it has passed through theshed.

9. In shuttleless looms for continuously feeding the weft shots incombination with a shed, a reed and a pair of bobbins placed on bothsides bins being stretched in front of both ends of the shed from theselvedges of the last pick at the fell of the-cloth to said bobbins; adevice for insertingsingle wefts and weaving from both sides of theloom, said device comprising a weft .inserter for alternately grippingsaid threads, said weft inserter comprising two slots situated to theright and left of the central lineof the weft,

inserter and extending obliquely with respect to the height of the weftinserter toward that surface of theweft inserter which slides along thereed, a pair of; grooves being formed on' a surface of the weftinserter, each groove forming a. continuation of a separate slot, a pairof clamps for gripping the weft and carried by the weft inserter, eachclamp being situated in a separate slot, 9. pair of cutting bladescarried by said weft inserter, each cutting blade being situated at thebottom of each of the slots, a pair of fixed eyelets situated at bothends of the shed, and a pair of fixed weft releasing blades situated-atboth ends of the shed. v

10. In shuttleless looms for continuously feedlng the weft shots, incombination with a shed, a reed and a pair of bobbins placed on bothsides of the loom, the weft threads fed from said bob-' bins beingstretched in front of both ends of the shed from the selvedges of thelast pick at the fell of the'cloth to said bobbins; a device forinserting single wefts and weaving from both sides of the loom,'saiddevice comp'rising a weft inserter for alternately gripping saidthreads, said; weft inserter comprising two slots situated to the rightand left of the central line of the weft inserter and extendingobliquely with respect to the height of the weft inserter toward thatsurface of the weft inserted which slides along the reed, a pair ofgrooves being formed on a surface of the loom, the weft threads fed fromsaid bobof the weft inserter, each groove forming a continuation of aseparate slot, a pair of clamps for gripping the weft and carried by theweft inserter, each clamp being situated in a separate slot, a pair ofcutting blades operatively arranged at both edges of the cloth adjacentthe selvedges,

a pair of fixed eyelets situated at both ends of the shed, and a pair offixed weft releasing blades situated at both ends ofthe shed.

RAYMOND DEWAS.

